ADDISON WWTP NORTH Wastewater Treatment Plant, Addison, Illinois

ADDISON WWTP NORTH is a municipal wastewater treatment facility located at 765 North Addison Road in Addison, Illinois, within DuPage County. The plant serves a population of around 36,942 residents, placing it in the medium-agglomeration category for the region. It is part of the broader wastewater infrastructure managed by local authorities to protect public health and the environment. As a U.S. facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Illinois Environmental Protection Agency. For a plant serving this population size, secondary treatment is typically required, with additional nutrient removal standards applicable in sensitive watersheds. The designed capacity is reported as 1.00 million gallons per day, indicating the plant's intended treatment volume. The treated effluent from ADDISON WWTP NORTH is discharged into local waterways that ultimately drain into the Mississippi River basin. This region is part of the Upper Mississippi River watershed, which supports diverse aquatic life and provides drinking water for millions downstream. Proper treatment at this facility helps reduce nutrient loading and protect water quality in the greater Mississippi River system.

The plant discharges into receiving waters that flow into the DuPage River, a tributary of the Illinois River, which joins the Mississippi River. This watershed supports diverse fish populations and migratory birds. Nutrient management is critical in this basin to prevent hypoxia in the Gulf of Mexico, where the Mississippi River terminates.